7. Stockholders' Equity (Details) - USD ($) $ in Thousands	3 Months Ended		6 Months Ended
	Jun. 30, 2018	Jun. 30, 2017	Jun. 30, 2018	Jun. 30, 2017
Beginning Balance, Amount			$ 32,007
Restricted stock units issued, Amount			0
Share-based compensation expense			38
Restricted stock unit compensation expense			73	$ 6
Dividends declared			(542)
Net income	$ 947	$ 1,318	503	50
Effect of adoption of ASU 2016-01			0
Repurchase of common stock			(616)	$ (217)
Ending Balance, Amount	31,463		31,463
Common Stock
Beginning Balance, Amount			$ 8,307
Beginning Balance, Shares			13,844,584
Restricted stock units issued, Amount			$ 23
Restricted stock units issued, Shares			38,353
Ending Balance, Amount	$ 8,330		$ 8,330
Ending Balance, Shares	13,882,937		13,882,937
Additional Paid In Capital
Beginning Balance, Amount			$ 25,642
Restricted stock units issued, Amount			(23)
Share-based compensation expense			38
Restricted stock unit compensation expense			73
Ending Balance, Amount	$ 25,730		25,730
Accumulated Deficit
Beginning Balance, Amount			(5,450)
Dividends declared			(542)
Net income			503
Effect of adoption of ASU 2016-01			4,318
Ending Balance, Amount	(1,171)		(1,171)
Accumulated Other Comprehensive Income
Beginning Balance, Amount			4,318
Effect of adoption of ASU 2016-01			(4,318)
Ending Balance, Amount	0		0
Treasury Stock
Beginning Balance, Amount			(810)
Repurchase of common stock			(616)
Ending Balance, Amount	$ (1,426)		$ (1,426)